权限验证问题

string _strFormID = "PUR_PriceCategory";
BusinessObject _bo = new BusinessObject();
_bo.Id = _strFormID;
if (!PermissionServiceHelper.FuncPermissionAuth(this.Context, _bo,"6e4419a58cb4a8e86f6c385e14a17ad").Passed)
{
this.View.ShowMessage(ResManager.LoadKDString("没有价目表的查看权限,不允许查询!", "004005030003982", SubSystemType.SCM, new object[0]), MessageBoxType.Notice);
return;
}

这样验证当前是否有采购价目表查看权限，为什么明明是有权限，但是还是提示无权限呢
PS：把“6e4419a58cb4a8e86f6c385e14a17ad”换成Kingdee.K3.Core.SCM.SCMPermissionConst.PriceListQuery也是验证不过
大神帮帮忙！